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baf2a265c7
By adding an internal alias to avoid the GOT indirection.
On some architecture, __libc_single_thread may be accessed through
copy relocations and thus it requires to update also the copies
default copy.
This is done by adding a new internal macro,
libc_hidden_data_{proto,def}, which has an addition argument that
specifies the alias name (instead of default __GI_ one).
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Fangrui Song <maskray@google.com>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* Early initialization of libc.so, libc.so side.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <ctype.h>
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#include <elision-conf.h>
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#include <libc-early-init.h>
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#include <libc-internal.h>
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#include <lowlevellock.h>
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#include <pthread_early_init.h>
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#include <sys/single_threaded.h>
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#ifdef SHARED
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_Bool __libc_initial;
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#endif
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void
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__libc_early_init (_Bool initial)
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{
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/* Initialize ctype data. */
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__ctype_init ();
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/* Only the outer namespace is marked as single-threaded. */
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__libc_single_threaded = initial;
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#ifdef SHARED
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__libc_single_threaded_internal = __libc_initial = initial;
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#endif
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__pthread_early_init ();
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#if ENABLE_ELISION_SUPPORT
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__lll_elision_init ();
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#endif
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}
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